The Spring Blog

Welcome to another installment of This Week in Spring! We’ve got a lot to get into this week - even more so than usual! So, let’s get into it!

Starting to put together topics for the next season of Spring Tips: what would you like to see discussed?

— Josh Long (龙之春, जोश) (@starbuxman) January 13, 2017

This week there are a lot of great SpringOne Platform 2016 replays available online thanks to our very own Pieter Humphrey!

• Don’t miss Stéphane Maldini’s SpringOne Platform (S1P) 2016 talk introducing Reactor 3.0
• or this S1P 2016 talk by Sebastien Deleuze and Stephane Maldini on reactive programming options for the JVM (introducing Reactor and RxJava, among others)
• Yahoo! Marcin just tweeted some exciting news: Pact support has been added to Spring Cloud Contract
• Noriaki Tatsumi ( from Capital One) gave a nice S1P 2016 talk on operating a high velocity organization with Spring Cloud
• Google’s Ray Tsang and Bret McGowen put together a nice talk on using gRPC for Spring Developers
• in this S1P 2016 talk, Ben Hale, Paul Harris and Stephane Maldini introduce some of the nuance of building reactive APIs
• Ryan Baxter has just announced Spring Cloud Camden.SR4
• Glenn Renfro just announced Spring Cloud Task 1.1.2.RELEASE
• speaking of Spring Cloud Contract, I really dig this post by epages’ Mathias on building and testing event-driven microservices with Spring Cloud Contract
• I loved our very own Toshiaki Maki’s exhaustive repository demonstrating how to use Spring Boot with a larger number of different SQL persistence technologies. Great resource! Bookmark this!
• and speaking of persistence options, I really enjoyed community hero Michael Simmons’ talk on JOOQ and Spring Boot
• Hortonworks’s Tim Spann got a few great posts on using Spring Boot with Apache Phoenix or Apache Hive
• Martin Westergaard Lassen has put together a nice post on his top favorite seven (ahem! six.. :D) features of Spring Boot
• I really liked this post by Apigee’s Alan Ho on the reasons that organizations diffuse monolithic time-bombs: “If the monolithic stack doesn’t go, the good developers will”
• Yahoo! just open-sourced their continuous delivery platform called Screwdriver. This has little or nothing to do with Spring or Pivotal, directly, yet, but it’s yet another contender in the ever expanding ecosystem of continuous delivery tools, along with Pivotal’s Concourse, Netlfix Spinnaker (to which Pivotal, Google, Microsoft and Netflix all commit and contribute), Jenkins and so many more. Remember, at the end of the day, the most important metric for organizational agility isn’t cloud computing or microservices, it’s the ability to continuously (quickly and safely) deliver value to the customer.
• This is super cool! Now you can use Apache Camel with Spring Cloud Stream
• this is a topic near and dear to my heart: using a Spring Boot Slack bot to notify people of the availability of coffee
• Hurray! Cloud Foundry surgical routing is now supported in Spring Cloud Ribbon-based load-balancing
• want to consume of the Spring Cloud Services from .NET applications? Check out this post on Steeltoe
• Evan Brown put together a succinct blog introducing a replay of a talk on how to deploy Pivotal Cloud Foundry on Google Cloud Platform. Check out this talk on BOSH and Cloud Foundry Basics for Google Cloud Platform, pt. 1
• want to learn how to use Spring Cloud Security (and its OAuth support for clients) with RedHat’s Keycloak? Check this blog out by RedHat’s Kamesh out

Recorded at SpringOne Platform 2016.
Speaker: Stéphane Maldini
Slides: http://www.slideshare.net/SpringCentral/reactor-30-a-jvm-foundation-for-java-8-and-reactive-streams

The apparent simplicity of the publisher/subscriber model as exposed in Reactive-Streams can be deceiving. The relatively fast release cycle for libraries in that space is not a myth, concurrency is hard. To keep out undesired side-effects, most Reactive projects have adopted a vertical approach potentially excluding developers from decision-making around execution model or sometimes language.

Recorded at SpringOne Platform 2016.
Speakers: Sebastien Deleuze, Stephane Maldini
Slides: http://www.slideshare.net/SpringCentral/a-lite-rx-api-for-the-jvm

RxJava is a fully fledged and widely used solution to develop Reactive applications, but some interesting alternatives exist. After an overview of the main Reactive APIs available and of Spring Boot Reactive support, this workshop introduces how to develop Reactive applications using Reactor Core 2.5-a powerful and fast alternative. We will learn how to use Flux (N values) and Mono (single value) types with various exercises. This new API (which is the core of Reactor 2.5) is a game changer in the world of Reactive API on the JVM thanks to its Reactive eXtensions-based API (natively based on Reactive Streams and Java 8) and its unmatched performance.

Recorded at SpringOne Platform 2016.
Speakers: Noriaki Tatsumi, Capital One
Slides: http://www.slideshare.net/SpringCentral/operating-a-high-velocity-large-organization-with-spring-cloud-microservices

Releases are hard for many large organizations with complex systems. Challenges like manual processes, change approvals, compliances, legacy systems, varying deployment targets, and scheduled downtimes prevent companies from releasing fast and frequently. Many of us know that when Continuous Delivery is embraced and microservices architecture is done right, those challenges can become things of the past. Some high performing companies like Netflix have successfully demonstrated the concept. Now it’s your turn. This presentation prepares you to build a microservices architecture that’s not only reliable, resilient, and scalable but also addresses the challenges large organizations typically face.

Recorded at SpringOne Platform 2016
Speakers: Ray Tsang, Bret McGowen, Google
Slides: http://www.slideshare.net/SpringCentral/grpc-101-for-spring-developers
gRPC is a high performance, open source, general RPC framework that puts mobile and HTTP/2 first. gRPC is based on many years of Google’s experience in building distributed systems - it is designed to be low latency, bandwidth and CPU efficient, to create massively distributed systems that span data centers, as well as power mobile apps, real-time communications, IoT devices and APIs. It’s also interoperable between multiple languages.

Recorded at SpringOne Platform 2016.
Speakers: - Ben Hale, Paul Harris, Stephane Maldini
Slides: http://www.slideshare.net/SpringCentral/designing-implementing-and-using-reactive-apis

The Java community is on the cusp of a major change in programming model. As the industry moves towards high-performance micro-service architectures, the need for a reactive programming model becomes clear. In this session, the lead developers of the Cloud Foundry Java Client will talk about what led them to choose a reactive API. Using that project as a lens, they’ll explore how they designed and implemented this API using Project Reactor and what users will expect when using a reactive API. If you are a developer looking to provide reactive APIs, this is your chance to gain the experience of team building a large, production-ready reactive library.

On behalf of the team, I am pleased to announce that Camden Service Release 4 of Spring Cloud is available today. The release can be found in our Spring Release repository and Maven Central.

This release includes primarily bug fixes. Release notes can be found on our wiki.

The following modules were updated as part of Camden.SR4:

• Spring Cloud Commons 1.1.7.RELEASE
• Spring Cloud Netflix 1.2.4.RELEASE
• Spring Cloud Sleuth 1.1.1.RELEASE
• Spring Cloud Contract 1.0.3.RELEASE

And, as always, we welcome feedback: either on GitHub, on Gitter, on Stack Overflow, or on Twitter.

We are pleased to announce that Spring Cloud Task 1.1.2.RELEASE is now available via Github, Pivotal download repository, and Maven Central.

The main driver for this Spring Cloud Task release is to correct an error in the dependencies within the 1.1.1.RELEASE.

What do you think?

We look forward to your feedback on these new features in Github, StackOverflow, or to me directly via Twitter @michaelminella!

Spring Cloud Task Home | Source on GitHub | Reference Documentation

Welcome to another installment of This Week in Spring! This week I’m in San Francisco and New York City talking to developers and toiling on the final edits to the O’Reilly book Cloud Native Java (almost there!). Also, marketing ninja Pieter Humphrey is ramping up the S1P 2016 replays, so fasten your seat belt and check the S1P 2016 YouTube playlist for the most current releases. We’ve got a lot to cover this week so let’s get to it!

• Spring Cloud Task ninja Glen Renfro just announced Spring Cloud Task 1.1.1 with a fast following, bug-fix only, 1.1.2 release.
• our latest and greatest Spring Boot team member Madhura Bhave just announced Spring Boot 1.5.0.RC1
• Spring Integration guru Artem Bilan just announced Spring Integration 5.0.M2
• Spring Batch and Spring Cloud Task lead Michael Minella just announced Spring Batch 4.0 complete with a lot of niceties and - in particular a feature I’ve wanted forever - an easy way to build instances of the more sophisticated ItemReader and ItemWriter intances, including the FlatFileItemReader! This is been a long time in coming and I can’t wait for this release. This rounds out the already epic Java configuration story for Spring Batch.
• Spring IO Platform lead Andy Wilkinson just announced Spring IO Platform Athens SR2, which brings with it new revisions of Spring Boot, Spring Retry, Spring AMQP and so much more
• Spring framework ninja and Kotlin afficianado Sebastien Deleuze just blogged about some of the coming improvements to support the Kotlin language in Spring framework 5
• Microservice developers working on security and service disovery won’t want to miss Spencer Gibb’s S1P 2016 replay: Spring Cloud with Consul and Vault. If you are new to Vault, Mark Paluch has you covered with a S1P replay that was published last week in Spring.
• Catch Spring Data lead Oliver Gierke as he delivers a Spring Data REST deep dive at S1P 2016, now on youtube!
• Shin Tanimoto’s S1P 2016 session offers techniques for visualizing microservices built by Spring Boot applications using Elasticsearch, Kibana and Spring Cloud Sleuth.
• Apache Geode and Pivotal Gemfire enthusiasts won’t want to miss this masterclass from hoopy froods John Blum and Luke Shannon about Spring Data and in memory data management in action, recorded at S1P 2016.
• Using Spring Boot on Cloud Foundry? Scott Frederick shows you how to wield autoconfiguration and the Java Buildpack like a boss to access platform and off-platform services in his talk recorded at S1P 2016.
• Are you a Apache Cassandra user? Spring Data experts Mark Paluch, John Blum talk about the community module turned 1st class project, Spring Data Cassandra in this S1P 2016 replay.
• Pivotal’s very own Ben Wilcock put together a very nice example project that demonstrates how to use Spring Cloud Services with Pivotal Cloud Foundry
• He also put together a handy demo of Spring Cloud Contracts
• Our very own Toshiaki Maki Making put together a nice post on some of the niceties in Spring Boot 1.5 and how they integrate with the Pivotal Apps Manager for Cloud Foundry
• Daniel Olszewski has put together a quick and easy look at configuring time-to-live values for the Spring Cache abstraction
• I liked this German-language post on building REST services with Spring Boot
• Jose Praveen did a nice job demonstrating how to integrate an H2 database with a Spring Boot application
• I liked Sam Chu’s Chinese-language post on setting up multiple MongoDB connections in a Spring application
• this is a well-thought out look at how to do validation of JSON payloads in a REST API